loongson/pypi: links for collectd-plugin-vmg1312-xdsl

loongson/mirror collectd-plugin-VMG1312-xDSL-1.0.5.tar.gz
loongson/mirror collectd-plugin-VMG1312-xDSL-1.0.4.tar.gz
loongson/mirror collectd-plugin-VMG1312-xDSL-1.0.3.tar.gz